Kollek mill



June 5, 1923.

F. E. MARCY ROLLER MILL Origina FiledJan 25, 1919 Reiuued June 5, 1923.

UNITED STATES Re.'15,6 ZZ

PATENT OFFICE.

rm! 3. KABCY, or nos nnonnns, cauronm noLLEn MILL.

Original Io. 1,881,601, dated December 7,1820, Serial No. 278,097, filed January 25, 181 9. Renewed October 18, 1920, Serial No. 418,773. 'Application for reissue filed November 29, 1922. Serial No.

To all whom it may concern Be it known that I, FRANK E. Manor, a citizen of the United States, residing at Los Angele s, in the county of Los Angeles and State of California, have invented certain new and useful Improvements in Roller Mills, of which the following is a specification, reference being had to the accompanying drawings, forming a part thereof, the same being a division of an apphcation filed on the 16th day of November, 1922, Serial No. 601,240, for reissue of my Patent No. 1,361,601, dated December 7 1020.

The present invention is directed to improvements in roller (or rod) mills which, as well understood in the 'art, belong to that class of reducing or disintegrating apparatus wherein the material is reduced by means of freely moving reducing bodies in the form of rods or rollers extended longitudinally substantially the length of the reducing compartment of the mill, the latter belng 1n the form of a suitable tumbling barrel, drum, or

equivalent tubular container or treatment vessel rotated about a fixed axis, the opposite ends of the barrel being provided respectively with intake or feed, and discharge openings for the material. The present improvement is concerned with that t pe of mill in which the discharge end is le t open and unobstructed (in contradistinction to the trunnion overflow type of mill) for the passage of the reduced material therethrough and for'the purpose of affording access to the interior of the mill at all times, and permitting inspection of its contents at any sta e of the reducing operation. A mill of t e open end type he're referred to is preferably, though not necessarily, provided with a flange or diaphragm at the point of discharge, and it is desirable in a mill of the character referred to, to provide means for preventing the reducing bodies from being projected out of the mill through the open discharge end, or through the available opening defined by the inner edge of the flange aforesaid; and in the present embodiment of my invention 1 resort to a suitable rod-intercepting door or guard mounted in relation to the barrel in such a way that while it permits of the free and uninterrupted discharge of the material from the mill, it yet serves above, the guard partakes of the nature of a door which is movable relatively 'to the barrel, that is it may be opened for purposes of inspection of the mill contents or for the purpose of gaining access to the reducing compartment of the mill at any stage of the reducing operation.

The present improvement is characterized mainly by simplicity of construction and effectiveness in operation, and advantages of the improvement will be clearly apparent from the following detailed description in connection with the accompanying drawings in which- Fig. 1 represents a side elevation of a mill with parts broken away, showing my invention embodied therein.

Fig. 2 is a vertical middle longitudinal section of the barrel of the mill.

' Fig. 3 is an end view of Fig. 2.

Referring to the drawings: 7

D represents a (preferably) cylindrical container, drum, tumbling barrel or equivalent tubular member slightly pitched to the horizontal h, the reducing compartment C of the barrel containing the usual complement of reducing bodies which in the present example are in the form of longitudinally ex tended, loose, elongated reducing rods or rollers 1 free to tumble in the barrel as the latter rotates in the operation of the mill, only a portion of the entire complement of rods being herein illustrated. The wall liner 2 is provided with inclined lifters 3 which operate to first lift the rods and then release them in such a way as to cause the rods to tumble or precipitate away from the discharge opening of the mill, the rods being maintained permanently in the reducing compartment C through the combined action of the pitch of the mill, the lifters 3,'the flange 4 on the open discharge end of the mill which likewise serves to raise or build up the pulp line, and the guard or rod-intercepting plate or door to which the present improvement is in the main directed. In the present example, the mill is provided with a hollow feed or intake trunnion 5 equipped with a conventionalscoop feeder 6, which scoops up the pulpfrom a suitable launder 7, the material discharged from the mill being caught in a launder 8 as well unthe opening defined by the inner edge of the flange and thus close said opening. The door is hinged to the barrel in the present instance by means of a pivot pin a, and is locked normally closed by means of a capscrew d as clearly shown in Figs. 1 and 2. The door is formed with a circular, substantially continuous discharge slot or passage-way w at such a point as to raise the pulp line athe desired degree. The passage-way or slot through the door extends circumferentially, and at the outer face of the door it is interrupted at intervals by intact portions of the door or its equivalent; but this interruption in no wise interferes with the free discharge of the pulp from the mill which takes place wholly within the limits of the wall of the barrel.

As shown, the slot or passage-way in the door has 1ts outer wall inclined outwardly away from the axis of the barrel. Pref erably the periphery of the door 9 is made beveled or conical and the inner edge of the flange is correspondingl formed to receive the door; and the pu p which builds up to the line a: flows out through the passage-way in the door and into the launder 8 as indicated by the arrows.

As stated'above the function of the door or guard 9 is to intercept any rod tending to precipitate out of the mill during the reducing operation; but the door may be I swung open at any stage of the reducing operat'ionto allow for the inspection of the mill contents, to'make necessary repairs, and the like.

The diameter of the door will necessarily depend on the width of the flange 4; and where such a flange is dwarfed or entirely absent, the door is correspondingly enlarged so as to entirely close the end of the barrel, and the discharge slot may be formed in the door at an fixed radial distance from the center of t e door, depending upon the desired pulp line. y

The operation is the same as in all mills of the general type or class to which the present mill belongs. The mill or barrel is given a rotation in the direction indicatedby the arrows in Fig. 1, the wall near the rods will remain normally out of contact with the door or guard 9, but any rod which happens to strike the door 9 will of course necessarily be intercepted and revented from falling out of the mill. he impact of the rodsagainst the door is not however frequent as the rods are in the main kept in the mill by the pitch of the mill, by the deflecting action of the lifters 3, and by the flange 4. The pulp enters the reducing compartment C through the hollow feed trunnion 5 and the finished product discharges directly; as previously indicated through the passage-way in the door.

The door or rod-intercepting member or plate 9 is, it will be observed, disposed across the rotation axis of the mill or barrel, said axis passing preferably through the center of the door, and as the flange 4 extends inwardly from the wall of the barrel towards the rotation axis, the door closes across the plane of disposition of the flange.

In' the construction described, the discharge slot for the material conforms to the position desired forthe pulp line, which, of course may be raised or lowered according to circumstances, and according to conditions to be met in practice. The present invention of course is not to be restricted in its application to mills with a pulp line closing across the discharge end and adapted to be moved at will to a position to per-1 mit access to the reducing compartment, said guard having its inner surface substantially free of obstructions to free movement of the rods having a discharge opening extending through it from one side to the other for the discharge of the material from the re ducing compartment directly through the guard, and the said guard serving when in closed' position to intercept the reducing rods to prevent their accidental escape.

2. In a mill of the character. described, a rotatable barrel having a feed end and a discharge end and provided with a reducing compartment adapted to contain longitudinally extending, loose, freely movable, re-

ducing rods, and a rod-intercepting guard iao "reducing comfpartment, said guard having its inner sur ace substantially free of ob.- structions to free movement of the rods and being provided with a suitable discharge slot at a fixed radial distance from thecenter of the guard for thedischarge of the materialfrom the reducing compartment directly through the guard, and said rd serving when disposed across the disc ge end of the barrel to intercept the reducing the discharge end and adapted to be moved rods to prevent their accidental escape.-

3. In a mill of the character described, a rotatable barrel havi a feed end and a discharge end and provided with a reducing compartment adapted to contain longitudinally extending, loose, freely movable, re-

ducing rods, and a rod-intercepting guard disposed across the "discharge end and adaptedto be moved at will to a position to permit access to the reducing compartment,

said guard being provided'with a circular substantially continuous discharge slot extendin through it from one side to the other for the discharge of the material from the reducing compartment directly through the guard, and the said guard servin when disposed across the dischar end of t e barrel to intercept the reducing rods to pre-' vent their accidental escape.

4. In a mill of the character described, a

- rotatable barrel having'a feed end and a discharge end and provided with a reducing compartment ada ted to contain lon tudinally extending, oose, freely movabe reducing rods, and a rod-intercepting guard disposed across the discharge end 7 and adapted to be moved at will to a position to permit access to the reducing compartment, said guard being provided with a circular substantially continuous discharge slot interrupted at the outer side of the guard,

and extending through it from one side to the other for the discharge of the material from the reducing compartment directly throu h the guard, and the said guard serving w en disposed across the discharge end of the barrel to intercept the reducing rods to prevent their accidental escape.

' 5. In a mill of the character described, a rotatable barrel having a feed end and a dis charge end and provided with a reducing compartment adapted to contain longitudinally extending, loose, freely movable, reducing rods, and a rodinterceptin guard fitting within the discharge end adapted to be moved at will to aposition to permit access to the reducing compartment, said guard having its inner surface substantially free of obstructions to free movement of the rods and having a discharge opening extendbarrel.

tudinally extending, loose, freely movabe reducing rods, and a rod-intercept' rd gua attached to the barrel and dis across at will to a position to permit access to the reducing cornfpartment, said guard its inner sur ace substantiall freesof obstructions to free'movement o the rods and being provided with a suitable discharge slot for the discharge of the material from the reducingcomp'artment directly throu h the guard, the said slot being spaced a su stantial distance from the wall of the barrel to build up or raise the pulp line in the mill, and said guard serving when disposed across the dischar end of the barrel, to

intercept the reducing rods prevent their accidental escape.

7. In a mill of the character described, a tumbling barrel having a feed end and a discharge end to rovide a reducingcom partment adapted tocontain elonga loose, freely movable, reducing bodies, and

a hinged door closing across the discharge end and adapted to prevent the accidental escape of the reducing bodies from the end of the reducing compartment, a suitable passage-way being formed through the door and so disposed as to effect the direct dischar of material from thebarrel wholl within the limits of the wall of the barre -.8. In a mill of the character described, a rotatable barrel adapted to contain reducing bodies and having a feed end and -a charge end, and a guard disposed across the discharge end of the barrel to prevent discharge of said bodies, a suitable circumferential slot being formed through-the guard for the direct discharge of the material, the outer wall of said slot being inclined outwardlly away from the axis of'the barrel.

9. n a mill of the character described, a

Ill

tumbling barrel having a feed end and a discharge end, an inwardly flange'a-t the discharge end of and a door fitting within the movable relatively thereto, and provided with a passage-way through it for efiecting the direcfl discharge of material from the time In testimony whereof, I haveaflixed my signature hereto.

FRANK E. MARCY.

flange and 

